U.S. Air Force Senior Master Sgt. Alberto Santini, assigned to the 156th Airlift Wing, Puerto Rico Air National Guard, stands on the flight line of Volk Field Air National Guard Base, Wis., Jan. 26, 2010, during an operational readiness exercise.
(DoD photo by Tech. Sgt. Erik Gudmundson, U.S. Air Force/Released)
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